{"kind":"host","input":"northwestern.edu","report":{"host":"northwestern.edu","checkedAt":"2026-11-02T16:56:38.657Z","a":{"status":"found","values":["129.105.136.48"],"ttl":26,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2620:10d:2060:1130::11"],"ttl":29,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.northwestern.edu","a":{"status":"found","values":["129.105.136.48"],"ttl":30,"via":"Cloudflare","cname":["common.wideip.northwestern.edu"]},"aaaa":{"status":"found","values":["2620:10d:2060:1130::11"],"ttl":30,"via":"Cloudflare","cname":["common.wideip.northwestern.edu"]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"northwestern.edu has an AAAA record and answers on it.","addresses":[{"address":"2620:10d:2060:1130::11","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.northwestern.edu has an AAAA record and answers on it.","addresses":[{"address":"2620:10d:2060:1130::11","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"chcspprf10.ads.northwestern.edu","ipv6":false},{"host":"evcspprf11.ads.northwestern.edu","ipv6":false},{"host":"evcspprf10.ads.northwestern.edu","ipv6":false},{"host":"evcspprf12.ads.northwestern.edu","ipv6":false},{"host":"chcspprf12.ads.northwestern.edu","ipv6":false},{"host":"chcspprf11.ads.northwestern.edu","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"accuvax.northwestern.edu","ipv6":true},{"host":"cicada.northwestern.edu","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.","hops":[{"url":"https://northwestern.edu/","address":"2620:10d:2060:1130::11","status":301,"tls":"valid"},{"url":"https://www.northwestern.edu/","address":"2620:10d:2060:1130::11","status":200,"tls":"valid"}]},"receiptId":"6084CiE65J","reused":true,"measuredAt":"2026-11-02T16:56:38.935Z"}